SOLR-7429: Making the servlet-api jar a compile-scope dependency in solr-core caused it to be included in the war, where it should not be.  Added *javax.servlet* to list of things to exclude from the war.
SOLR-7429: Making the servlet-api jar a compile-scope dependency in solr-core caused it to be included in the war, where it should not be.  Added *javax.servlet* to list of things to exclude from the war.

git-svn-id: e799fff536a883f3c27ef733fe770373e8a19271@1676026 13f79535-47bb-0310-9956-ffa450edef68

PATRIC3/p3_solr,PATRIC3/p3_solr,PATRIC3/p3_solr,PATRIC3/p3_solr,PATRIC3/p3_solr,PATRIC3/p3_solr,PATRIC3/p3_solr